<|begin_of_text|><|start_header_id|>system<|end_header_id|>Calculate the total emissions change based on activity and energy intensity changes.<|eot_id|><|start_header_id|>user<|end_header_id|>Activity contribution: -13%; Energy intensity contribution: 8%.<|eot_id|><|start_header_id|>assistant<|end_header_id|>The total emissions change is -5%.<|eot_id|>